JEE Main 2020 — d and f Block Elements Question with Solution
JEE Main 2020 (04 Sep Shift 2)
Question
The incorrect statement(s) among (a) - (c) is (are) :
(a) is more stable than .
(b) in the presence of , permanganate titrations provide satisfactory results.
(c) some lanthanoid oxides can be used as phosphors
Choose an option
Show full solutionCorrect option: C
Step-by-step explanation
(a) In transition metals on moving down the group higher oxidation states are more stable due to smaller size of atoms, due to lanthanide and actinide contractions.
(b) can oxidise chloride into chlorine, so it will give incorrect results
(c) its a fact
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This is a previous-year question from JEE Main 2020, covering the d and f Block Elements chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.